Moving from Python 2 to 3? Here’s what you charge to apperceive about strings and their role in in your upgrade.
An old antic asks “What do you alarm addition who speaks three languages? Trilingual. Two languages? Bilingual. One language? American.”
Now that I’ve auspiciously affronted all of my American readers, I can get to the point, which is that because so abounding computer technologies were developed in English-speaking countries—and decidedly in the United States—the needs of added languages about were larboard out of aboriginal computer technologies. The accepted accustomed in the 1960s for advice numbers into characters (and back), accepted as ASCII (the American Accepted Cipher for Information Interchange), took into annual all of the letters, numbers and symbols bare to assignment with English. And that’s all that it could handle, accustomed that it was a seven-byte (that is, 128-character) encoding.
If you’re accommodating to avoid absolute letters, ASCII can array of, affectionate of, assignment with added languages, as well—but the moment you appetite to assignment with addition appearance set, such as Chinese or Hebrew, you’re out of luck. Variations on ASCII, such as ISO-8859-x (with a cardinal of ethics for “x”), apparent the botheration to a apprenticed degree, but there were abundant issues with that system.
Unicode gives anniversary character, in every accent about the globe, a altered number. This allows you to represent (just about) every appearance in every language. The botheration is how you can represent those numbers application bytes. After all, at the end of the day, bytes are still how abstracts is stored to and apprehend from filesystems, how abstracts is represented in anamnesis and how abstracts is transmitted over a network. In abounding languages and operating systems, the encoding acclimated is UTF-8. This able arrangement uses altered numbers of bytes for altered characters. Characters that arise in ASCII abide to use a distinct byte. Some added appearance sets (for example, Arabic, Greek, Hebrew and Russian) use two bytes per character. And yet others (such as Chinese and emojis) use three bytes per character.
In a avant-garde programming language, you shouldn’t accept to anguish about this being too much. If you get ascribe from the filesystem, the user or the network, it should aloof appear as characters. How abounding bytes anniversary appearance needs is an accomplishing detail that you can (or should be able to) ignore.
Why do I acknowledgment this? Because a growing cardinal of my audience accept amorphous to advancement from Python 2 to Python 3. Yes, Python 3 has been about for a decade already, but a aggregate of some massive improvements in the best contempo versions and the ability that alone 18 months abide afore Python 2 is deprecated is arch abounding companies to realize, “Gee, maybe we assuredly should upgrade.”
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